The ear is a lot more conscious of larger frequencies, which hence surface louder. The size is logarithmic and a boost of 10dB approximates to your doubling of loudness Whilst a change of 3dB is nearly apparent. Many aspects contribute to the general cost of secondary glazing, frequently the size, https://glazing-solutions12333.blogscribble.com/34800787/the-5-second-trick-for-retrofit-windows